Means for heading nails and tacks



H. W. WILSON Oct. 4, 1932.

MEANS FOR HEADING NAILS AND TACKS Filed Feb. 1'7, 1952 lllllil` Patented Oct. 4, 1932 Prix i rarer HARRY w. Winsen, or stroUGHroN, MASSACHUSETTS MEANS FOR HEADING -lil'lliILS AND 'PACKS ppIication filed February 17, T932. "Serial No. 593,603.

rlhe invention has relation to means for heading nails, tacks and the like, and it consists in the novel construction and combinations of claims.

In previous means for this purpose, the nails being headed withinthe bore of the heading die, wherefrom the heading pin never movesV beyond heading position, the bore of the heading die frequently becomes plugged With slivers or pieces of metal abraded from the nail blank in the heading operation, thereby causing is likely to result i of the heading die and heading pin caused by the added strain, and it is an object of the invention to provide means to avoid this jamming and plugging, as also the breaking and splitting of the heading die and heading pin.

In the accompanying drawing illustrating an embodiment of the invention:

Figure 1 is a side view of the invention as applied.

Figure 2 is a similar view with parts in section and parts broken away, showing the heading die in heading position.

Figure 3 is a view similar to Figure 2 showing the heading die in i'irst position prior to being moved upwardly to heading position.

In the drawing, the numerals l and 2 represent the gripping dies between which the blank nail or tack :Ts held while the head is being formed thereon, these dies being of the usual construction and havin suitable dejamming which pressions to shape the under .side of the head.

3 is the heading lever, hinged at 4, and being pivot-ally moved from first position shown in Figure 3 to heading position shown in Figures 1 and 2 by eccentric or crank operated means 5 all of which is well known.

The heading tool incluoes a die carrier 6, cylindrically bored `longitudinally thereof, and wherein at the forward end thereof the heading die 7 is mounted and adapted for some longitudinal or cushioning movement, against cushioning spring 8, a screw 9 threaded in saidV die carrier engaging an annular groove 10 of said die to secure the die in the carrier and admit of said movement.

The die 7 is centrally bored longitudinally parts set forth Vin the appended in breaking and splittingthereofrat 11 and insa-id bore Works the heading pin 12, .having an independent longitudinal movement. Located within the die carrier 6 in rear of the die 7, isa case-or holder 13, centrally bored longitudinally thereof to receive the heading pin, a screw 14, Working in a slot 15 y'of the die carrier and threaded into a perforation of said case or holder serving to secure .the heading pin in position Within the latter, which acts as a centering -or aligning means for the heading pin relative to the die. A coiled spring V16 engaging vadjacent reduced vpositions of the die 7 and case 13 serves to maintainthe spaced relation of said parts and also to retract the said case and the heading pin in the heading operation, wherein the heading pin occupies the retracted position shown in Figure 2.

The case or holder 13 is Vprovided with an lenlargement `of its bore .at 17, wherein tits the enlarged rear -end portion 18 of the heading pin, said enlarged rear end portion serving to prevent the burring of the :reading pin.

As the heading pin and the heading tool are moved from heading position of Figure 2 to intermediate position of Figurev 3, the heading pin is moved forwardly from heading position of Figure A2 to position of Figure 3, thereby causing protrusion of the forward end of the heading pin from the heading die to carry out and clean the bore of said die of any slivers or pieces of m-etal abraded from the nail blank in the heading operation.

The means used for causing this independent movement of the heading pin within the bore of the die consists of aplunger 19, working in the bore of the die carrier 6, and having al lateral n 20,engaged by a pawl or pusher device 21, pivoted at 22, at theupper end of an arm of bell lever 23, pivoted to the heading lever at .24, the other arm of said bell lever having screw 25, engaging the bed 26 of the machine. In this way as the parts move from the position of Figure 2 to position of Figure 3, the Weight of the parts act upon kscrew 25 to move the bell lever and plunger for the purpose stated. An adjusting screw 27 in the rear end of the die carrier limits the rearward movement `of. the

plunger and regulates the position of the heading pin in the die carrier.

1. In a heading tool, having a longitudinally bored die carrier and a longitudinally bored heading die mounted in said die carrier; a heading pin mounted to work within the bore of the said die, a longitudinally bored member within the die carrier and spaced from said die and having a rear enlargement of its bore,the heading pin having engagement with Vthe bore of said member and being provided with a. rear enlargement engaging the rear enlargement of the bore of said member, a coiled. spring located between the heading die and said member, a plunger Working in the die carrier and engaging said rear enlargement of the heading pin for moving the heading pin forwardly' against the resistance of said spring, the latter serving to retract-the heading pin on reverse movement of said plunger.

2. In a heading machine for nails, tacks and the like, the combination of blank gripping dies, a heading lever, means forl moving said lever towards and away from said gripping dies, a longitudinally bored die carrier carried by said lever, and a longitudinally bored heading die mounted in the die carrier; of a heading pin mounted to work within the bore of said die, means for moving the heading pin forwardly within the bore of said die during the movement ofsaid heading lever away from heading position, and means for retracting the heading pin to heading position during the movement of said lever towards heading position.

8.7In a heading machine for nails, tacks and the like, the combination of blank gripping dies, a heading lever, means for moving said heading lever` towards and away from said gripping dies, a longitudinally boreddie carrier carried by said lever, and a longitudinally bored heading die mounted in the die carrier; of a heading pin mounted to work within the bore of said die, means for moving the heading pin forwardly within the bore of said die during the movement of said heading lever away from heading position including a lever device pivotedto the heading lever and having an element engaging the bed of the machine, and means for retracting the heading pin to heading position during the movement of said lever towards heading position. Y

VIn testimony whereof I affix my signature.

' HARRY W. WILSON. 

